Home / 429,946.20-644,925.60-163,721.43

Finding the Fourth Proportional to 429,946.20, 644,925.60 and 163,721.43

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Solution

The fourth proportional to 429,946.20, 644,925.60 and 163,721.43 is: 245,584.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,946.20 : 644,925.60 = 163,721.43 : x
  2. Step 2: Convert to fraction form
    429,946.20/644,925.60 = 163,721.43/x
  3. Step 3: Cross multiply
    429,946.20x = 644,925.60 × 163,721.43
  4. Step 4: Simplify right side
    429,946.20x = 105,588,141,475.61
  5. Step 5: Solve for x
    x = 105,588,141,475.61/429,946.20
  6. Step 6: Final answer
    x = 245,584.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.